Distinguish between a parasite and a saprotroph.

3

(a)

Give a brief description of the process of synthesis of food in green plants.

3

(a)

If plant has a requirement for nitrogen, then from where will they obtain it?

3

(a)

In the absence of photosynthesis, life would be impossible on earth. Is it true or false?

3

(a)

2. (a) Draw a diagram of a pitcher plant to show the following parts:
(i) Pitcher
(ii) Lid
(b) What is the mode of nutrition of this plant?
(c) Is it an autotroph or partial heterotroph?

3

(a)

Name the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.

3

(a)

Why do we get instant energy from glucose?

3

(a)

Discuss the various associated glands of digestive system and their role in digestion.

3

(a)

Ruminants such as cows and buffaloes swallow their food hurriedly and then sit restfully and chew their food. Give reason.

3

(a)

Explain the process of rumination in the ruminant animals.

3

(a)

Given below is a sequence of steps in the processing of wool. Which are the missing step? Add them.
Shearing, .... sorting ......, ......,......

3

(a)

Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.

3

(a)

Describe the mode of heat transfer in water or gases.

3

(a)

Write three differences between an organic acid and a mineral acid.

3

(a)

"The polar region presents an extreme climate", comment on the statement.

3

(a)

Write three main differences between distance and displacement

3

(a)

State the uses of different kinds of mirrors.

3

(a)

What do you mean by water cleaning?

3

(a)

What are the various alternative arrangements for sewage disposal other than WWTP?

3

(a)

What are the different types of inorganic and organic impurities generally present in sewage?

3

(a)